Take command of your vehicle's lighting with the Standard Ignition Headlight Switch HLS-1256, a direct-fit replacement for the 2004-2007 Buick Rainier, 2003-2009 Chevrolet Trailblazer, 2003-2006 Chevrolet Trailblazer EXT, 2007-2009 GMC Envoy, 2004-2005 GMC Envoy XUV, 2005-2007 Isuzu Ascender, and 2003-2004 Oldsmobile Bravada. This switch controls the headlight and related lighting circuits, so when the original wears out you can get your lights responding to the driver again.
Key features:
- Copper alloy conductors for strong electrical conductivity with low resistive losses.
- 100% tested to verify both mechanical and electrical switching performance.
- Robust design and high-grade materials built to meet the demands of today's service professional.
- Backed by decades of research and development focused on the technician's needs.
Signs the original switch may need replacing include headlights, parking lights, or dash lighting that flicker, fail to turn on, or won't switch between modes — diagnose the circuit first, since these symptoms can have other causes. If a failed headlight switch is the cause, this unit replaces it. See the Buyer's Guide tab for engine-level fitment details.
Interchange: S10123 · SW4186 · HL7281 · 10372950 · 15067052 · 25932633
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this headlight switch do?
It controls the headlight and related lighting circuits, letting the driver switch the vehicle's lights on, off, and between modes. If a failed switch is the cause of your lighting issue, this replaces it.
Which vehicles does the HLS-1256 fit?
It's a direct-fit replacement for the 2004-2007 Buick Rainier, 2003-2009 Chevrolet Trailblazer, 2003-2006 Trailblazer EXT, 2007-2009 GMC Envoy, 2004-2005 Envoy XUV, 2005-2007 Isuzu Ascender, and 2003-2004 Oldsmobile Bravada.
How is this switch built for durability?
It uses copper alloy conductors for strong conductivity with low resistive losses, plus a robust design and high-grade materials to meet the demands of today's service professional.
Is this switch tested before shipping?
Yes. Standard Ignition parts are 100% tested to verify both mechanical and electrical switching performance.
What are signs my headlight switch may be failing?
Headlights, parking lights, or dash lighting that flicker, won't turn on, or won't switch modes can indicate a bad switch. Diagnose the circuit first, as these symptoms can have other causes.
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